Answer:
Q= 12 KJ
Heat enters to the system.
Explanation:
Given that
m= 5 kg
P₁ = 400 KPa
T₁ = 30⁰C = 303 K
Work done by the system ,W₁= 15 KJ
Work is done on the system W₂ = - 3 KJ'
Given that expansion is isothermal ,that is why temperature of the gas will remain constant.We know that internal energy of the ideal gas only depends on the temperature of the gas.That is why change in the internal energy of the gas will be zero because change in the temperature is zero.
From first law of thermodynamics
Q = W + ΔU
Q= =Heat ,W= Net Work ,ΔU =Change in the internal energy
Here ΔU = 0
Q= W
Q= 15 - 3 KJ
Q= 12 KJ
Heat enters to the system.
Note -
Work done on the system will be taken as negative and work done by the system taken as positive.
Heat added to the system will be taken as positive heat leaving from the system taken as negative.
Answer:
aye son yall think if i keep answering these questions incorrectly.. they'll find out what im doing and take my li points back?
Explanation:
The change in temperature here corresponds to a sensible heat. The amount of energy required can be calculated by multiplying the specific heat capacity, the amount of the substance and the corresponding change in temperature.
Heat required = mCΔT
Heat required = 0.368 kg (0.0920 cal/g°C) (60 - 23)°C
Heat required = 1.25 cal
Test questions measure recall; matching concepts with their definitions measures recognition.
<u>Explanation:
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According to Psychology our brain remembers everything what we learn but the understanding and remembering the right answer for the right question needs training and understanding ability. So in order to enhance the ability of recalling and recognizing among the students, the concept of test questions and matching with definitions are used in curricular activities.
As the students will be learning different terms, definitions, methods and different subjects, they should be able to distinguish among different definitions as well as they should recall the things they have learnt. So the answers for the test questions will help to recall the topics learnt by the students while the matching concept will help the students to recognize each definition with their terms.